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以5-氨基间苯二甲酸、间苯二甲酰氯(IPC),4,4′-二氨基二苯醚(4,4′-ODA)为原料合成间苯二甲酸基团(IPAG)封端的低分子量芳香族聚酰胺LODA-IPAG,并通过与铜离子配位形成金属有机多面体(MOPs)交联网络结构，制备一种具有良好力学性能的Cu-MOPs复合薄膜材料(LODA-MOPs)。通过红外光谱、小角X射线散射、扫描电镜等手段验证了Cu-MOPs结构的生成，并探究大分子配体的分子量对LODA-MOPs力学、热学及击穿性能的影响。结果表明：LODA-MOPs的力学性能随分子量的增大而提升，拉伸强度和弹性模量最高可达71.1 MPa和954.7 MPa。Cu-MOPs的动态性质赋予材料重复溶解加工性能，并且作为交联结构能够大幅提高复合材料的击穿强度，最高可达286.8 MV/m,几乎是原有聚合物的两倍。研究可为开发高性能的MOPs复合材料提供新思路。
Abstract：Low molecular weight aromatic polyamide LODA-IPAG with isophthalic acid end groups(IPAG) was synthesized using 5-aminoterephthalic acid, isophthaloyl chloride(IPC), and 4,4'-diaminodiphenyl ether(4,4'-ODA) as raw materials. Through cross-linking with copper ions to form metal-organic polyhedrons(MOPs), a Cu-MOPs composite film with excellent mechanical properties was prepared, denoted as LODA-MOPs. The formation of the Cu-MOPs structure was verified using characterization techniques such as infrared spectroscopy, small-angle X-ray scattering(SAXS), and scanning electron microscopy(SEM). The study investigates the effect of the molecular weight of macromolecular ligands on the mechanical, thermal, and breakdown performance of LODA-MOPs. Results show that the mechanical properties of LODA-MOPs improve with increasing molecular weight, reaching a maximum tensile strength of 71.1 MPa and modulus of 954.7 MPa. The dynamic nature of Cu-MOPs endows the material with the ability for repeated dissolution and processing. As a cross-linked structure, Cu-MOPs significantly improve the breakdown strength of composite materials, achieving a maximum of 286.8 MV/m, which is nearly double that of the original polymer. This research provides new insights into the development of high-performance MOPs-based composite materials.
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基本信息:
DOI：10.19886/j.cnki.dhdz.2025.0086
中图分类号:TQ323.6;TB332
引用信息:
[1]黄晨,李娜,于俊荣,等.金属有机多面体交联低分子量芳香族聚酰胺的制备与性能[J].东华大学学报(自然科学版),2025,51(06):112-119.DOI:10.19886/j.cnki.dhdz.2025.0086.
基金信息:
国家重点研发计划(2021YFB3700101); 国家自然科学基金(52373030)